Coupling device



Jan. 7, 1930. RYSTEDT 1,742,416

COUPLING DEVICE Filed May 21, 1923 Patented Jan. 7, 1930 UNITED. STATES PATENT oral-ca- INGEMAR. K. BYSTED'I, OF DAYTON, OH IO, ASSIGNOR TO THE RYSTED'J. ENGINEERTNG COMPAN Y, OF DAYTON, OHIO, CORPORATION OF OHIO COUPLING DEVICE Application filed May 21,

, A further object of the invention is to provide such a device which will constitute a very strong rigid mechanical connectlon between the conductor and the terminal and will these parts.

A further object of the invention is to provide a device of this kind which is simple In its construction and operation and which may be produced at a low cost.

Other objects of the invention will appear as the device is described in detail. In the accom anying drawings Fig. 1 is a plan view of tlie coupling device of my invention showing the same applied to the terminal stud of a storage battery; Fig. 2 is a side elevation of the same; Fig. 3 is a longitudinal sectional view taken centrally through the coupling device; Fig. 4 is a side elevation of the coupling member; Fig. 5 is a plan view so of the coupling member; and Fig. 6 is a front elevation of the clamping member.

In these drawings I have illustrated one embodiment of my invention and have shown the same as comprising a coupling member having a part 1, which is preferably annular in form, to embrace the terminal stud 2 of the storage battery. The opening in the annular coupling member is of such a diameter that it will readily slip onto and 0d of the terminal. A conductor 3 may be connected with the coupling member in any suitable manner but, in the present device, the annular portion of the coupling member is provided with a radial projection, preferably in the form of a hollow stud 4, adapted to receive the end of the conductor. As here shown the bore of the hollow stud is of such a size that'it will receive the conductor only, the insulation 5 of the cable abutting against the end of the 0 boss. The cable may be secured within the establish perfect electrical connection between 1923. serial No. 'e4o,449.

hollow bossby sweating the same therein by means of solder introduced through the inner end of the bore of the boss.

p plates 8 and 9 are adapted to engage the adjacent surface of the terminal and they are of such width that they may extend for a considerable distance beyond the inner edge of the annular coupling member, thereby enabling the device to be applied to a stud of a diameter considerably less than the diameter of the couplin member. The edges of the contactplate w ich engage the terminal may be of any s'uitablecharacter but I prefer to provide them with cutting edges so that they will penetrate any accumulation of dirt or any glazed surface on the "terminaland thus establish perfect electrical contact therewith. As shown at 10 in Figs. 1 and '6, the

contact plates are provided with curved seats to conform substantially withthe curvature an of terminal and these seats are serrated.

The clamping member may be moved into and out of engagement with the terminal in any suitable manner but I prefer to employ a nut 11 which is screw threaded onto the hollow boss 4 and can be readily manipulated to force the clamping plates against the ter minal with any desired amount of ressure and which will firml hold the c amping member in its adjuste position. It will be apparent that I have produced a terminal clamp which is very simple in its construction and very easily operated. To apply the same it is only necessary to retract the nut 11 far enough to permit the Withdrawal of the clamping plates-out of alinement with the opening in the coupling mem- I 'ber. The coupling member is then placed about the terminal and the nut actuated to force the clamping plates into firm contact 2 T Luc us therewith. The contact Flates e ging the terminal on both sides 0 the coup member establish a very firm rigid connection between the parts, and the cutting edges of the 7 plates penetrating the surface 0 the terminal which is usually of lead, establish good electrical contact therewith.

While I have shown and described one embodiment of m invention wish it to'be unb derstood that do not desire to be limited to the details thereof as various modifications may occur to one skilled in the art.

' Havin now fully described my invention what I c aim as new and desire to secure by 15 Letters Patent, is:

a -In a couplin device of the character described, a coup 'n member havin an annular portion to em race a termina stud and having a laterally extending boss'adapted to mo receive one end of a conductor and provided with external screw threads, a substantially U-shaped clamping member having an apertured transverse portion extending about and slidably su ported on said boss and having a substantia dy parallel portions arranged on opposite si s of said coupling member and provided with edges to engage said stud on the respective sidesof said coupling member, and a nut screw threaded onto sald boss to 3,0 engage said clamping member and force said edges into contact with said stud and to draw said cou ling member into firm contact with said stu thereby causing said coupling device as a, whole to be rigldly secured to and as supported by said stud.-

h testimony whereof I aflix my signature INGEMAR K. RYSTEDT. 

